7,930 yuan. When the down payment for a 1.8 million house is 300,000 yuan, the loan amount is 1.5 million yuan, the loan term is 30 years, and the annual interest rate is 5.39, the monthly repayment is approximately 7,930 yuan. According to the query of Bank of China’s first home loan interest rate, the total price of the house is 1.8 million, the down payment is 300,000, the loan amount is 1.5 million, the loan term is 30 years, and the annual interest rate is 5.39. As of April 2023, monthly repayments are required Payment: First calculate the monthly interest rate of the loan, that is, 5.39/12=0.4492. Then calculated based on the equal principal and interest repayment method, the monthly repayment amount is: (loan principal × monthly interest rate × (1-month interest rate) ^ number of repayment months) ÷ ( (1-month interest rate) ^ number of repayment months - 1) Substitute the numerical values ??to get: (1.5 million × 0.4492 × (1 0.4492) ^ (30 × 12)) ÷ ( (1 0.4492) ^ (30 × 12) -1) = about 7,930 yuan (the result is slightly error, actual calculation Precise calculations should be used).